Hi, I've reported this upstream (https://bugzilla.redhat.com/show_bug.cgi?id=1413106), and this is not a bug: thin-provisioning should be used. Snapshots defined on thin- provisioned LV's show good characteristics.
Gerben ** Bug watch added: Red Hat Bugzilla #1413106 https://bugzilla.redhat.com/show_bug.cgi?id=1413106 ** Changed in: lvm2 (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to lvm2 in Ubuntu. https://bugs.launchpad.net/bugs/1651838 Title: bootup halted, lvms NOT active, one LV lost Status in lvm2 package in Ubuntu: Invalid Bug description: Hi, The bootup process is stopping in 'emergency mode', I have to manually intervene and perform a 'vgchange -a y' and after 3.5 minutes 6 logical volumes are active (however I do have 7). Only then I can finalize the boot process. Subsequent (all) boots I have to intervene. lvdisplay fails to show one logical volume, which is shown under /dev/mapper. This volume is not used, just contained some offline data. I also had an unplanned reboot a few days ago on the machine without having it under a load. The lost LV was not in use at that time (has not been mounted for a long time). I've got one snapshot defined, which acts as a mirror (LV Size same as origin), with only 4.31 % allocated to that snapshot. When viewing the system with a live desktop only the 'cow' LV is shown under /dev/mapper, none of the other LV's. Why is this unused LV lost? The data on the 'lost' LV is not needed at the moment. I'll leave things 'as is' for the moment for investigation. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: lvm2 2.02.133-1ubuntu10 ProcVersionSignature: Ubuntu 4.4.0-57.78-generic 4.4.35 Uname: Linux 4.4.0-57-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.4 Architecture: amd64 Date: Wed Dec 21 19:25:22 2016 InstallationDate: Installed on 2016-06-01 (202 days ago) InstallationMedia: Ubuntu-Server 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.3) ProcEnviron: LANGUAGE=en_US:en TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: lvm2 UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lvm2/+bug/1651838/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
